FWIW, I made a “ringtone” that was one second of nothing, and I’ve made that the default ringtone. Anybody in my phone’s phone book gets a real ringtone.
So any time somebody calls me the first time, I never hear it and it goes to voice mail. If they become somebody I want to talk to, I put them in my phone’s phone book and they get a real ringtone.
That’s sort of how I do email. I couldn’t sort out the junk so I switched to sorting out the expected emails. The ones remaining in the In Box were likely junk emails. It made it much simpler than figuring out all the ways scammers get past my filters.
You are a lot better at the systems than I am. I can only do the basics, like blow their ears out.
rwood